<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>原型</title>
  </head>
  <body>
    <script>
      function Star(uname, age) {
        this.uname = uname;
        this.age = age;
      }

      Star.prototype.sing = function () {
        console.log('我会唱歌');
      };

      var ldh = new Star('刘德华', 18);
      var zxy = new Star('张学友', 20);
      ldh.sing();
      zxy.sing();
    </script>
  </body>
</html>
